Four Pillars of a Great Replacement Window Experience: Window Glass II

Our last post in this series on the Four Pillars of a Superior Replacement Window Experience, we gave a short history of glass including the use of insulated glass in windows. In this post, we discuss some of the advances made over the last few decades to improve both the performance and durability of the high performacne insulated glass used in better replacement windows today.

Four Pillars of Successful Replacement Window Experience: Glass

Insulated Glass Improvements

Since the first iterations of insulated glass was used in windows, a number of improvements have been made to spacer materials, bonding agents, desiccants and seals. All of these advances have been designed to improve the performance and durability of the glass and window.

One of the biggest enemies of IGUs (Insulated Glass Units) is what’s referred to “seal failure”. Seal failure occurs when the bond of the glue-like materials that adheres and seals the glass panes to the spacer is broken. This allows outside air and moisture into the insulated glass air space, reducing the thermal efficiency of the window and causing the glass to “fog” with condensation, which reduces your visibility through the glass.

Over the past several decades, a great deal of scientific research and testing with different sealant materials has made tremendous advances in the durability and performance of window sealant technology. The best performing insulated glass today uses two different types of sealants to ensure the strength, durability and performance longevity of the Insulated Glass Unit or IGU.

Inert Gasses Improve Replacement Window Efficiency

Although insulated glass has traditionally been constructed with normal clean air trapped between the two panes of glass, new high performance insulated glass windows have been developed that use inert gasses such as Argon or Krypton in the air space. These gasses, which are denser than air, improve the thermal efficiency of the window considerably, reducing heat loss through the window and improving the energy efficiency of the home. More energy efficient windows creates a more comfortable living space and  reduces the heating and cooling expense for you.

Window Glass Coatings Keep Solar Heat Gain, UV Out

In addition to inert gasses in the air space, additional high-tech glass coatings have been developed to further improve the energy efficiency of high performance insulated glass windows.

If you’ve ever spent any time in a car on a sunny day with the windows closed and the air conditioning off, you’ve experienced how much solar heat can be transferred through glass from the sun. To combat solar heat gain through glass windows, the most energy efficient insulated glass today use what are known as spectrally selective glass coatings. These coatings, made of exotic metals and compounds, reflect and reduce the heat gain through the glass and also help reduce the ultraviolet light that can fade carpets and draperies.

High–Performance™ Low-E4® SmartSun® Glass

Renewal by Andersen replacement windows use High-Performance Low-E4® SmartSunTM glass that use both energy efficient inert gasses in the air space and spectrally selective glass coatings to reduce heat gain and keep you more comfortable year-round. Low-E4® SmartSunTM is Renewal by Andersen’s most energy-efficient glass ever and is up to 70 percent more energy efficient in summer as compared to ordinary dual pane glass. This glass has Renewal by Andersen’s highest energy efficiency rating in cool weather. SmartSunTM glass also blocks an amazing 95% of harmful UV rays, helping to protect furniture, carpets and wall coverings.

Andersen High-PerformanceTM Low-E4® glass is standard on all Renewal by Andersen windows and Frenchwood® patio doors.

Key benefits of Low-E4® glass include:

•Up to 56% more energy-efficient in summer and 45% more efficient in winter compared to ordinary dual-pane glass.

•Innovative coating reduces water spots and makes cleaning easier

•Blocks 83% of UV rays that can fade fabric and damage furniture

•Significantly reduces the level of sound coming into your home

Renewal by Andersen products are rated, certified, and labeled by the National Fenestration Rating Council® (NFRC) – a non-profit organization that provides fair, accurate and credible energy performance ratings for windows and doors.

As one of the main pillars in your Replacement Window satisfaction, your choice of window glass will have one of the largest impacts on your long-term happiness with your new windows. Be sure to consider all the features and benefits of your replacement window glass choices before making your final selection.

Your Renewal by Andersen of Long Island design consultant will be happy to demonstrate the performance of our glass at a free, no obligation in home design consultation. Call us at 1-877-313-9052 or fill out the short form on this page to schedule your appointment today.

Check out this post for more information on replacement window glass.

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